133720340 has 24 divisors (see below), whose sum is σ = 302414280. Its totient is φ = 49373568.

The previous prime is 133720337. The next prime is 133720369. The reversal of 133720340 is 43027331.

It is a happy number.

133720340 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 917764 + 132802576 = 958^2 + 11524^2 .

It is a super-2 number, since 2×133720340² = 35762258659431200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256895 + ... + 257414.

It is an arithmetic number, because the mean of its divisors is an integer number (12600595).

Almost surely, 2^133720340 is an apocalyptic number.

133720340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133720340 is an abundant number, since it is smaller than the sum of its proper divisors (168693940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133720340 is a wasteful number, since it uses less digits than its factorization.

133720340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514331 (or 514329 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 23.

The square root of 133720340 is about 11563.7511215003. The cubic root of 133720340 is about 511.3667555748.

Adding to 133720340 its reverse (43027331), we get a palindrome (176747671).

The spelling of 133720340 in words is "one hundred thirty-three million, seven hundred twenty thousand, three hundred forty".